Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong hieu da snippets" » "dong hieu code snippets", "dung hieu da snippets", "dong trieu da snippets", "doc hieu da snippets", "dong hieu dac snippets", "dong hieu dia snippets", "dong hieu va snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong hieu da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong hieu da snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong hieu da snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong hieu da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.